If marginal cost of an additional unit of output is greater than average cost, then average cost will rise.

In the above figure, what is the marginal cost of the 8th pizza?

A) $1.50 B) $12 C) $6 D) $96 E) 8 pizzas

For the past several decades, the percentage of national income in the United States allocated to physical capital (rents, interest, profit) has been approximately

a. 20 percent. b. 40 percent. c. 60 percent. d. 80 percent.